// 
// Copyright(c) 2009 Syntext, Inc. All Rights Reserved.
// Contact: info@syntext.com, http://www.syntext.com
// 
// This file is part of Syntext Serna XML Editor.
// 
// COMMERCIAL USAGE
// Licensees holding valid Syntext Serna commercial licenses may use this file
// in accordance with the Syntext Serna Commercial License Agreement provided
// with the software, or, alternatively, in accorance with the terms contained
// in a written agreement between you and Syntext, Inc.
// 
// GNU GENERAL PUBLIC LICENSE USAGE
// Alternatively, this file may be used under the terms of the GNU General 
// Public License versions 2.0 or 3.0 as published by the Free Software 
// Foundation and appearing in the file LICENSE.GPL included in the packaging 
// of this file. In addition, as a special exception, Syntext, Inc. gives you
// certain additional rights, which are described in the Syntext, Inc. GPL 
// Exception for Syntext Serna Free Edition, included in the file 
// GPL_EXCEPTION.txt in this package.
// 
// You should have received a copy of appropriate licenses along with this 
// package. If not, see <http://www.syntext.com/legal/>. If you are unsure
// which license is appropriate for your use, please contact the sales 
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// This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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// 
/*! \file
 */

#ifndef XSLT_RESULT_TREE_FRAGMENT_H
#define XSLT_RESULT_TREE_FRAGMENT_H

#include "xpath/ValueHolder.h"
#include "xslt/xslt_defs.h"
#include "grove/Node.h"
#include "grove/NodeVisitor.h"

namespace Xslt {

/*! \brief ResultTreeFragment
 */
class ResultTreeFragment : public Xpath::ValueHolder,
                           public GroveLib::NodeVisitor {
public:
    XSLT_OALLOC(ResultTreeFragment);
    ResultTreeFragment();
    ~ResultTreeFragment();

    //! Reimplemented from ValueHolder
    virtual Xpath::ConstValuePtr    value() const;
    GroveLib::Node*                 rtfRoot() const { return rtf_.pointer(); }

    virtual void    nodeDestroyed(const GroveLib::Node*) {}
    virtual void    childInserted(const GroveLib::Node*) { notifyChanged(); }
    virtual void    childRemoved (const GroveLib::Node*,
                                  const GroveLib::Node*) { notifyChanged(); }
    virtual void    attributeChanged(const GroveLib::Attr*) {}
    virtual void    attributeRemoved(const GroveLib::Element*,
                                     const GroveLib::Attr*) {}
    virtual void    attributeAdded(const GroveLib::Attr*) {}
    virtual void    textChanged(const GroveLib::Text*) {}

private:
    GroveLib::NodePtr       rtf_;
    Xpath::ConstValuePtr    rtfRoot_;
    static Xpath::Value*    emptyValue_;
};

} // namespace Xslt

#endif // XSLT_RESULT_TREE_FRAGMENT_H

